Nah, its not that. Real time combat just doesn't work. That and the fact that this game is ancient. This is an example of why old doesn't make a game good. In fact it makes the game more problematic. There is only 1 way of getting past battles in this game, interrupt the spell caster. There are no tactics, no strategy. After you do what your supposed to, you just hope for the best. That is how fuckin random these games are.
Its a good thing that the sales for enhanced edition didn't go well.
I'll admit that due to the way AD&D is set up, there is a large amount of randomness in combat at very low levels. By the time you get to level 3 or 4, which you should be for the bandit camp, battles should depend much more on tactics than on any random dice roll.
If you want to interrupt a spellcaster, just use 2 or 3 archers and/or a mage. That will work 99% of the time.
As for the "real time doesn't work" (which doesn't make any sense considering there are far more games that use real time than turn-based these days), you are aware that you can pause the game, right? You even have options to let the game pause automatically under certain circumstances.
Also, what does the age of the game have to do with its quality (apart from graphics obviously)? There are games older than BG that are better, others that are much worse, and the same goes for newer games.